Time Mark Corporation Model 257B-400 3-Phase Monitor

Time Mark Corporation Model 257B-400 3-Phase Monitor. 165-240 V.A.C. 400Hz. Carefully removed from operational system. No manual. As shown.

Product Description:

The Time Mark Corporation Model 257B-400 3-Phase Monitor is engineered to continuously oversee 3-phase power lines, ensuring the detection of abnormal conditions such as phase loss, low voltage, and phase reversal. Operating within a voltage range of 160-240V AC at a frequency of 400Hz, this monitor is suitable for both Wye and Delta systems without the need for a neutral connection.

Equipped with a solid-state voltage and phase-angle sensing circuit, the Model 257B-400 drives an electromechanical relay that energizes under correct voltage and phase rotation. In the event of a fault, the relay de-energizes and automatically resets once the issue is resolved, ensuring minimal downtime and maintenance.

Key Features:

• Continuous Monitoring: Detects phase loss, low voltage, and phase reversal.
• Automatic Reset: Ensures seamless operation after fault correction.
• Solid-State Sensing: Utilizes voltage and phase-angle sensing for accurate detection.
• No Neutral Required: Compatible with both Wye and Delta systems.
• Indicator Lights: ‘TRIP’ and ‘NORM’ indicators assist in system troubleshooting.

Applications:

• Industrial Equipment Protection: Safeguards motors and machinery from phase-related issues.
• Power Distribution Systems: Ensures stability and reliability in power networks.
• Aerospace and Defense: Suitable for systems operating at 400Hz frequency.

Specifications:

Why Choose the Time Mark 257B-400?

• Reliable Protection: Ensures continuous operation by detecting and responding to phase anomalies.
• Versatile Compatibility: Functions effectively in various 3-phase systems without requiring a neutral connection.
• User-Friendly Indicators: Simplifies troubleshooting with clear ‘TRIP’ and ‘NORM’ condition indicators.